Reamer-chuck



J. J. DIEL.

BEAMER CHUCK APPLICATION FILED DC.8, 1919. 1;369,632. Fatemi Feb.22,1921.

JOSEPH JOHN nrnL, ors'r. LOUIS, Mrssounr, Assrcrivon or ONE-'HALF ToFRAnKLrn 2 .ri-ier.;

G. NEAL, OF ST. LOUIS., llfSSO'URI.

Y arianna-CHUCK'.

Application led December 8, 1919@ Serial'No. 343,15.`

To aZZwrom t may concern:

Be it lmown that I, JOSEPH JOHN DIEL a citizen of the United States,residing at t. Louis and Stategof Missouri, have invented certain newand useful Improvements in Beamer-Chucks, of which the following is aspecification.

This invention relates to improvements in reamer chucks. v

An important object of the invention is to provide a lchuck whereby abroken reamer or other fluted tool may be chucked for use after theshank thereof has been broken away.

High speed and carbon reamer bits, drills and the like often break fromtheir Shanks when in vuse and their utility is destroyed, as with theloss of the shank it becomes practically impossible to hold the reamerin a.

chuck. Furthermore the construction :of the shank and tang upon reamersand drills adds considerably to the price thereof both for labor andmaterial. I have provided a new chuck whereby a fluted instrument may bechucked even more efficiently without the shank than with the shank.This chu-ck embodies grip ngers which extend between the uted ribs lofthe tool and engage the body portion thereof from which. a tool may bereadily removed and a new one inserted( Other objects and advantageswill be apparent throughout the course of the following description. Y

In the accompanying drawings wherein for the purpose of illustration isshown a preferred embodiment of my invention,

Figure 1 is a side elevation partly in section of a` reamer chuckembodying my invention.

Fig. 2 is a section taken on the line 2 2 thereof looking in thevdirection of the ara source of motive power, as for example, an

air or electric drill, drill press, or the live spindle of a lathe. Thebody portion 10 is provided with circumferentiallyV spaced openings 12adapted to receive a wrench for tightening the base of the body portionof the instrument of motive power.

The body portion 10 is provided with a Specification of Letters Patent.Y Patetd Felix-22, 1921; r v

second axial bore 13 adapted to receive the shank 14 of a chuckingportion 15. The chucking portion 15 is provided with cir# cumferentiallyspaced longitudinal slots 16 which communicate with a central bore 17thereby forming circumferentially spaced lingers 18 joined together atone end by the shank 14. y

Formed upon the fingers 18 are enlarged portions 19 which are adapted toseat in circumferentially spaced slots`20 formed in the body portion 10.It will be seen that y when the shank 14 is disposed within the bore 13and the shoulders or enlargements 19 are seated in the slots 20, thatthe chucking portion 15 is securely held against rotation with relationto the body portion 10. The lingers 18 are further provided with anenlarged portion 21 which tapers forwardly as at 22 so that the forwardends of the fingers are much reduced in s ize.v The fingers 18 aresuiiiciently resilient toL allowl their gripping reamers of varioussizes' within certain limits. i

The exterior of the body portion 10 is provided at the end receiving theIchucking Y portion 15 with external screw threads 28, adapted toreceive an `internally screw threaded cap 24. This cap 24 is. providedwith a tapered bore 25 adapted to coact with tapered portions 22 of thefingers 18.

It will be seen that when the cap 24 is screwed down upon the threads 23of the shank 10l the tapered surface thereof con.

tacting with tapered surfaces of the fingers .will cause these fingersto be forced into engagement with the flutes of the tool. In Order tofacilitate the turning of the cap 24,

it is provided with 'circumferentially spaced recesses 26 adaptedtoreceive a wrench.

yAs many changes are possible in the shape,

size, and arrangementof the various parts shown and described, I donotfflimit myself to the specific structure herein set forth, but maymake any such changes without departing from the spirit of theinvention, or the scope of the subjoined claim.

Vhat I claim is:

In a chuck, a body portion provided with an axial bore havingcircumferentially spaced slots therein adjacent the outer end of thebody portion, the outer end of the body portion being externallythreaded, a ohucking portion embodying a shank adapted to be receivedWithin the bore in said body portion, said shank being provided upon oneend With eireumferentially spaced lingers, a relatively large shoulderformed on each of said fingers, said shoulders being adapted to bereceived in the slots in said body portion, the outer ends of saidlingers being provided lWith tapered portions adjaf Cent said shoulders,and an internally threaded cap engaging the external threads of the bodyportion, the outer end of said cap being taperedinternally to engage the15 tapered portions of said lingers.

In testimony whereof I affix my signature in presence of two Witnesses.

JOSEPH JOHN DIEL.

Witnesses:

A. DICKMAN,

MARTE H. REILLY.

